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vee ‘7 U.S. DE ARTMENT OF COM; ERCE Air Commerce Bulletin Issued Monthly by the Bureau of Air Commerce f Vol. 9 WASHINGTON, AUGUST 15, 1937 No. 2 CONTENTS Airways improvement projects announced by Advisory committee formed to sasist in civil Department of Commerce. D a irway operation problems. No y omentia BDEDO! ea a2 u inshi accident i tengera in June 1987. any AAE Dee ureau of Air Commerce Advisory Board holds Gem, to co United Bites. this suman ‘ experimental fights first meeting. Designation of medicai teamniners. Air Lines employ 286 hostesses and 105 | Airports, charts, and lights stewards. Licenses, approvals, ard ratings. Airways Improvement Projects Announced by Department of Commerce A program of airways constructicn| ever form of transmission he requires representing plans for expenditure of |at the moment. about $5,000,000 of the $7,087,500 which | As it ig necessary that range signals the Department’s appropriation act for}and voice broadcasts be on the same the fiscal year 1938 authorizes for es- frequency, stations operating on the tablishment of air-navigation aids has | older basis have to interrupt the range bee announced by the Bureau of Air) signais to broadcast voice. Although Commerce, Department of Commerce.|] ihe intervals are brief, not exceeding The act appropriates $3,037,800 for this|3 minutes, they may occur at times purpose for the fiscal year 1938 and] when pilots urgently need radio range authorizes the Department to obligate | guidance. Simultaneous transmission itself for an additional $2,000,000 prior | does away with these interruptions. Service installation of ultra-high fre- to July 1, 1938, plus a further $2,000.- 000 prior to July 1, 1939. quency transmitters, also developed by the Bureau, to furnish a positive indi- The Bureau’s program is designed primarily to improve the existing sys-! cation of the location of radio range stations is a major part of the pro- tem of ait-navigation aids by modern- gram, izing present aids and providing new facilities to fill in gaps in the present ‘A further phase of the improvement pian provides tor the equipment ot ali system. ndin a is adoption for Bene feature of atremita major radio stations now having the neous transmission of both voice and | loop type antennas, with vertical ra- radio range signals on the same fre-{diator antennas which improve the quency, which has been made possible | tTansmission ef directional signals to by the Bureaus’ development work. airmen and also are necessary for si- With simultaneous transmission the | ™multaneous transmission. radio range signals transmitted to keep In addition, several intermediate the pilot on his course are sent con-| landing fields wiil be enlarged, im- tinnously. Voice broadcasts are made | proved, or relocated, and Hghts on sec- from time to time on the same fre-| tions of four airways will be relocated quency, with the range still in opera-'in order to provide straight line tion, and the pilot may listen to which- | courses, 7544—37——-1 Ig $e A te cee cose ane etn ebncnnaneatrne seca alto AEA he oe cee ane Rien ne A EE Renee te tne ne tpnammaadierdlmerrN rte EE ore